Last weekend I finally had the time to make a keyboard for my students that we could use at the table during theory instruction. Students can work on identifying flashcards on this keyboard, they can spell scales, I can illustrate dominant and major 7th chords...the list goes on and on. They can even work on scale fingering.
But I can't take credit for this keyboard idea. Joy at Color In My Piano, who has a fabulous blog, posted this D.I.Y. keyboard back in 2010.